27801007 has 6 divisors (see below), whose sum is σ = 30104232. Its totient is φ = 25662312.

The previous prime is 27800989. The next prime is 27801029. The reversal of 27801007 is 70010872.

It is a happy number.

It is not a de Polignac number, because 27801007 - 2²³ = 19412399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27801107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82083 + ... + 82420.

It is an arithmetic number, because the mean of its divisors is an integer number (5017372).

Almost surely, 2^27801007 is an apocalyptic number.

27801007 is a deficient number, since it is larger than the sum of its proper divisors (2303225).

27801007 is a wasteful number, since it uses less digits than its factorization.

27801007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164529 (or 164516 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 27801007 is about 5272.6660239389. Note that the first 3 decimals coincide. The cubic root of 27801007 is about 302.9378292134.

Adding to 27801007 its reverse (70010872), we get a palindrome (97811879).

The spelling of 27801007 in words is "twenty-seven million, eight hundred one thousand, seven".